Label	Element	Value
Delmarva Power and Light Company [Member] | Electric Distribution [Member] | Merger Integration Costs [Member]
Amount of Impairment to Carrying Amount of Regulatory Assets	us-gaap_AmountOfImpairmentToCarryingAmountOfRegulatoryAssets	$ 1,000,000
Exelon Generation Co L L C [Member]
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared	us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared	$ 164,000,000